If you will not be receiving a Raspberry Pi, and would like to buy one yourself, then you can use this link:
That will get you everything you need, other than an SD card. It's a pretty great deal because the Pi itself is $39.00, so for an extra $11 you will get the case, a power card, heat sinks, and a "Getting Started" guide.
If you DID get a Pi, you will still need to buy a micro SD card!!! We recommend 16GB, HC micro SD card. If you're super into it, you can get a bigger one. Here are two suggested cards: